Tomatoes, planted in home gardens, are typically a harvest. In a cool climate your berries may call for a head start on the season. Tomatoes at a cold frame allows you to start your seedlings six to eight months before the danger of frost is past.
Select a place in the garden that receives at least six hours of sun daily. Normally, placing a cold frame beside a wall creates a warmer microclimate in the Bay Area’s cool, foggy coastal areas.
Pick tomato varieties. Tomatoes are a harvest, but a few forms are adapted to a shorter growing season and warmer temperatures. For instance, Toy Boy VF Sungold cherry and Valerie VFN are developed for areas, growing to maturity in 55 to 60 days from seed.
Put soil and then add water. Mix the soil and water until the soil is moist.
Organize containers on trays or cookie sheets. Fill each container with potting soil that is moist. Put three tomato seeds and pay with 1/4 inch of sand. Mist with water until the sand is moist.
Place the trays. Add an outdoor thermometer and shut the lid.
Check the frame that is cold . Open the lid slightly, if the temperature in the frame is over 80 degrees Fahrenheit. If the temperature is below 70 degrees Fahrenheit, add an old lamp soil warming cables or mulch into the frame.
Mist the sand regularly to maintain a moist environment for your tomato seeds. Tomatoes germinate under ideal conditions in five to ten days. In case the temperature in the frame is between 50 and 70 degrees Fahrenheit, the seeds will require time to sprout.
Snip the stems leaving only one plant . Continue to track the temperature and moisture inside the frame until the seedlings are 6 to 8 inches tall.
Fertilize with a balanced liquid fertilizer meant for berries after the next pair of leaves grows on the seedlings.
Open the frame for a couple hours each day to acclimate the seedlings to outdoor temperatures, wind and the sun. Repeat this procedure a week to ten days prior to transplanting the seedlings.